Insulin Dose Calculator
Calculate basal and bolus insulin doses based on weight, carb ratio, correction factor, and current glucose levels.
Medical Disclaimer
This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.
Inputs
Results
Basal Dose (50% TDD)
17.5 units
Meal Bolus Dose
4.5 units
Total Meal Bolus
6.1 units
How to Use This Calculator
- Enter your Body Weight in kg and your known Total Daily Dose (TDD) in units — or leave TDD at 0 to auto-estimate at 0.5 units/kg.
- Enter your Insulin-to-Carb Ratio (ICR in g/unit) — for example, 10 means 1 unit covers 10 g of carbs.
- Enter your Correction Factor (ISF) in mg/dL per unit and your Current Blood Glucose and Target Blood Glucose in mg/dL.
- Enter Carbs to Eat for this meal in grams.
- Review the Basal Dose (50% TDD), Meal Bolus Dose (carbs ÷ ICR), Correction Dose, and Total Meal Bolus — always confirm doses with your diabetes care team before adjusting.
How the result changes with Body Weight
| Body Weight | Basal Dose (50% TDD) | Meal Bolus Dose | Total Meal Bolus |
|---|---|---|---|
| 39 | 9.8 units | 4.5 units | 6.1 units |
| 112 | 28 units | 4.5 units | 6.1 units |
| 199 | 49.8 units | 4.5 units | 6.1 units |
| 271 | 67.8 units | 4.5 units | 6.1 units |
What each input means
- Body Weight
- Your body weight in kilograms. Used to estimate TDD if not provided.
- Total Daily Dose (TDD)
- Known total daily insulin dose in units. Leave at 0 to auto-calculate from weight (0.5 units/kg).
- Carb Ratio (ICR)
- Insulin-to-carb ratio: grams of carbs covered by 1 unit of insulin.
- Correction Factor (ISF)
- Insulin sensitivity factor: how much 1 unit of insulin lowers blood glucose (mg/dL).
- Current Blood Glucose
- Your current blood glucose reading in mg/dL.
- Target Blood Glucose
- Your target blood glucose level in mg/dL.
- Carbs to Eat
- Grams of carbohydrates you plan to eat this meal.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersBody Weight = 70, Total Daily Dose (TDD) = 0, Carb Ratio (ICR) = 10, Correction Factor (ISF) = 50 = 7 input(s) provided
- Calculate Basal DoseBasal Dose17.5 = 17.5
- Calculate Meal Bolus DoseMeal Bolus Dose4.5 = 4.5
- Calculate Total Meal BolusTotal Meal Bolus6.1 = 6.1
- Calculate Correction DoseCorrection Dose1.6 = 1.6
- Calculate Daily Bolus PortionDaily Bolus Portion17.5 = 17.5
Related Calculators
The questions that sit next to this one — chosen by subject, including calculators filed under a different category.
Renal Dose Adjustment Calculator
Estimate dose modifications based on glomerular filtration rate (GFR) for renally-cleared medications.
PharmacyMedication Adherence Calculator
Calculate your medication compliance rate by tracking pills dispensed vs pills remaining over time.
EndocrinologyInsulin Pump Calculator
Basal rates and bolus from total daily dose.
Clinical NutritionDiabetes Carb Counter Calculator
Count carbohydrates and calculate insulin bolus doses using the 500 rule (ICR) and 1800 rule (ISF). Includes correction dose for high blood glucose.
MotorcycleCarburetor Jet Sizing
Calculate carburetor jet size corrections for altitude and temperature.
More in Medical & Clinical.